using Jellyfin.Plugin.SSO_Auth.Api;
using Newtonsoft.Json;

namespace Jellyfin.Plugin.SSO_Auth.State;

/// <summary>
/// Converts <see cref="TimedAuthorizeState"/> to and from the representation held by a state store.
/// </summary>
public static class SsoStateSerializer
{
    private static readonly JsonSerializerSettings Settings = new JsonSerializerSettings
    {
        NullValueHandling = NullValueHandling.Include,
        DateTimeZoneHandling = DateTimeZoneHandling.RoundtripKind
    };

    /// <summary>
    /// Serializes an authorization state.
    /// </summary>
    /// <param name="state">The state to serialize.</param>
    /// <returns>The serialized state.</returns>
    public static string Serialize(TimedAuthorizeState state)
    {
        return JsonConvert.SerializeObject(state, Settings);
    }

    /// <summary>
    /// Deserializes an authorization state.
    /// </summary>
    /// <param name="payload">The serialized state, which may be null or empty.</param>
    /// <returns>The state, or <c>null</c> when there is nothing to deserialize.</returns>
    public static TimedAuthorizeState Deserialize(string payload)
    {
        return string.IsNullOrEmpty(payload) ? null : JsonConvert.DeserializeObject<TimedAuthorizeState>(payload, Settings);
    }
}